$17.83
Get Fast, Free Shipping with Amazon Prime FREE Returns
FREE delivery Monday, May 13 on orders shipped by Amazon over $35. Order within 9 hrs 19 mins
In Stock
$$17.83 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$17.83
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from
Amazon
Ships from
Amazon
Sold by
ProSource Pets
Sold by
ProSource Pets
Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
Returns
Eligible for Return, Refund or Replacement within 30 days of receipt
This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.
Read full return policy
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Payment
Secure transaction
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more

Hydro-Sponge Pro II Premium Reticulated Foam Sponge Filter for Aquariums up to 20 Gallons

4.5 4.5 out of 5 stars 152 ratings
$17.83
Get Fast, Free Shipping with Amazon Prime
FREE Returns
II - Up to 20 gallons
{"desktop_buybox_group_1":[{"displayPrice":"$17.83","priceAmount":17.83,"currencySymbol":"$","integerValue":"17","decimalSeparator":".","fractionalValue":"83","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"jOQhOuP3qH3N0UQUNxqOwaKQQm6gEgsXzf12LeZ%2FLiYSL20pY9N9y6ZHQeniR7qbFtevPxdRH6IrIm7%2FBFLfmp13jWag8wGZEFvngdRHcHo1RoS57iRyhqfA7xBwVhR%2FQvOHCC%2FQkFTcaB761dDBgnSMchjmAI3t1QBDHycmS4y8oF1Ng6%2FTV0m4JfQkeP0L","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}]}

Purchase options and add-ons

  • The Hydro-Sponge Pro filter employs premium reticulated foam to deliver high flow rates, whisper-quiet operation, and even cleaner water for freshwater and saltwater fish without cartridge replacements or an impeller
  • Quiet and easy to clean - simply rinse and squeeze in used tank water (not tap water!) to maintain nitrogen-fixing capability. Inner canister of filter can be filled with activated charcoal, carbon, or other media.
  • Hooks up directly to a powerhead or pump, and the diffuser can replace air stones. To set up, simply assemble, bury the base, and connect an air hose.
  • Soft foam filters across a wide surface area, creating bubbles to reduce protein buildup and increase oxygen. Ideal for low-current breeding, betta, discus, and turtle tanks.
  • Fast-cycle a new tank by transferring a filter sponge from old to new. For even more pristine water and longer filter life, combine with ATI Filter Max pre-filtration.

Customer ratings by feature

Easy to clean
4.7 4.7
Suction power
4.5 4.5
Value for money
4.5 4.5
See all reviews
Add a debit or credit card to save time when you check out
Convenient and secure with 2 clicks. Add your card

Frequently bought together

Hydro-Sponge Pro II Premium Reticulated Foam Sponge Filter for Aquariums up to 20 Gallons
$17.83
Get it as soon as Monday, May 13
In Stock
Sold by ProSource Pets and ships from Amazon Fulfillment.
+
PENN-PLAX Standard Airline Tubing for Aquariums – Clear and Flexible – Resists Kinking – Safe for Freshwater and Saltwater Fi
$6.72
Get it as soon as Monday, May 13
In Stock
Ships from and sold by Amazon.com.
+
Tetra Whisper Easy to Use Air Pump for Aquariums
$5.13
Get it as soon as Monday, May 13
In Stock
Ships from and sold by Amazon.com.
Total price:
To see our price, add these items to your cart.
Details
Added to Cart
These items are shipped from and sold by different sellers.
Show details Hide details
Choose items to buy together.

Product information

Feedback

Hydro-Sponge

Hydro-Sponge Pro II Premium Reticulated Foam Sponge Filter for Aquariums up to 20 Gallons

Found a lower price? Let us know. Although we can't match every price reported, we'll use your feedback to ensure that our prices remain competitive.

Where did you see a lower price?
/
/
/
/
Please sign in to provide feedback.

Product details

  • Package Dimensions ‏ : ‎ 6.3 x 3.2 x 3.1 inches; 8.78 ounces
  • Date First Available ‏ : ‎ March 31, 2020
  • Manufacturer ‏ : ‎ Aquarium Technology, Inc.
  • ASIN ‏ : ‎ B0855DSMB9
  • Customer Reviews:
    4.5 4.5 out of 5 stars 152 ratings

Looking for specific info?

Product Description

The Hydro-Sponge Pro series is a sponge filter workhorse. The “reticulated foam” is heavy duty, extremely porous and stiffer than our standard sponges, which allows even greater colonization and mechanical filtration using higher flow rates without clogging. This is serious filtration. These units have the same quality design and function as the standard Hydro-Sponge, but have the heavier constructed foam.The two key factors that differentiate this product are the reticulated foam sponge and its ability to withstand higher flow rates without damage to the foam.Hydro-Sponge filters stand tall over the competition with superior construction, quality materials, modular design (for easy expansion), and affordable pricing. While other sponge filters require suction cups that quickly fail ,or flimsy bases that allow the unit to fall over into the gravel or sand, the Hydro-Sponge filters are free standing with a heavy base that locks securely in place, but is easy to unlock if needed and is raised to allow sufficient space so that there are no dead areas between the aquarium floor and the filter.Our quality design brings the sponge filter to a whole new level as a serious filtration system that outperforms undergravel biological filters and goes toe to toe with any other filtration system. Breeder tanks, shrimp and invertebrates, tanks on the go, the need for quick bio-cycling - are all obvious applications for sponge filters, but many hobbyists are finding that the Hydro-Sponge is an excellent filtration alternative for any aquarium set up.This small but powerful submersible filter requires no external equipment or hanging reservoir, and can use an existing air pump or powerhead setup to achieve the gentle-yet-effective vacuum effect it uses to work.

Compare with similar items

This Item
Hydro-Sponge Pro II Premium Reticulated Foam Sponge Filter for Aquariums up to 20 Gallons
Hydro-Sponge Pro II Premium Reticulated Foam Sponge Filter for Aquariums up to 20 Gallons
Recommendations
Hydro-Sponge Pro IV Premium Reticulated Foam Sponge Filter for Aquariums up to 80 Gallons
Hydro-Sponge Pro IV Premium Reticulated Foam Sponge Filter for Aquariums up to 80 Gallons
dummy
Pawfly 3 Pack Aquarium Sponge Filter Quiet Betta Fry Shrimp and Small Fish Foam Filter for Tiny Fish Tank up to 10 Gallon
Pawfly 3 Pack Aquarium Sponge Filter Quiet Betta Fry Shrimp and Small Fish Foam Filter for Tiny Fish Tank up to 10 Gallon
dummy
Pawfly Aquarium Bio Sponge Filter Quiet Betta Fry Shrimp and Small Fish Foam Filter for Fish Tanks up to 20 Gallons
Pawfly Aquarium Bio Sponge Filter Quiet Betta Fry Shrimp and Small Fish Foam Filter for Fish Tanks up to 20 Gallons
dummy
ALEGI Aquarium Sponge Filter 20 Gallon,Quiet Sponge Filter with Air Stone for Betta Fry Shrimp and Small Fish (1 pcs)
ALEGI Aquarium Sponge Filter 20 Gallon,Quiet Sponge Filter with Air Stone for Betta Fry Shrimp and Small Fish (1 pcs)
dummy
ALEGI Aquarium Bio Sponge Filter Kit for for 40-80 Gallon Breeding Fry Betta Shrimp Fish Tank
ALEGI Aquarium Bio Sponge Filter Kit for for 40-80 Gallon Breeding Fry Betta Shrimp Fish Tank
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Details
Added to Cart
Price$17.83-11% $18.50
Typical: $20.90		-40% $5.98
List: $9.99		$5.99$8.99$12.99
Delivery
Get it as soon as Monday, May 13
Get it as soon as Tuesday, May 14
Get it as soon as Monday, May 13
Get it as soon as Monday, May 13
Get it as soon as Monday, May 13
Get it as soon as Monday, May 13
Customer Ratings
4.54.5 out of 5 stars152
4.54.5 out of 5 stars152
4.64.6 out of 5 stars2,134
4.64.6 out of 5 stars1,457
4.74.7 out of 5 stars22
4.64.6 out of 5 stars912
Easy to clean
4.7
4.7
4.6
4.6
—
4.3
Suction power
4.5
4.5
4.3
4.3
—
4.4
Value for money
4.5
4.5
4.5
4.4
—
4.2
Noise level
—
—
4.3
4.1
—
4.5
Sold By
ProSource Pets
ProSource Pets
Pawfly
Pawfly
hipanda
hipanda

Customer reviews

4.5 out of 5 stars
4.5 out of 5
152 global ratings

Customers say

Customers like the quality, performance, ease of installation, and bacteria of the filter. For example, they mention it's well made, effective, and works perfectly for raising fry. They appreciate the faster flow and more surface area for bacteria. Customers are also happy with ease of cleaning, and flow.

AI-generated from the text of customer reviews

7 customers mention5 positive2 negative

Customers like the quality of the pet supplies. They say it's well made and designed.

"...my smaller guys, it has the flow I needed for my pump, and it seems well made...." Read more

"Great filter. Superb quality. The reticulated ( coarse) sponge allows for more flow and better beneficial bacteria and greater time between cleaning...." Read more

"Great quality! Fish are happy" Read more

"Easy to clean, Effective, and High quality. Added an air stone inside and it's perfect. I bought two more for my other tanks." Read more

6 customers mention6 positive0 negative

Customers like the filter. They mention it's a great prefilter for a canister filter and a sponge filter.

"...size/ratio, are relatively stiff, and in my opinion are generally great prefilters." Read more

"Great filter. Superb quality. The reticulated ( coarse) sponge allows for more flow and better beneficial bacteria and greater time between cleaning...." Read more

"...This allows more surface area for the plants. These are excellent filters...." Read more

"Perfect sponge filter,you jeed a pretty powerful pump to really work it.its huge." Read more

5 customers mention5 positive0 negative

Customers are satisfied with the performance of the pet supplies. They mention that it works well, is easy to clean, and is of high quality. Some say that it's perfect for raising fry because it doesn't produce a strong current.

"...It works perfectly for raising fry because it doesn’t produce a strong current in the fry tank." Read more

"I have a 6 gallon Betta tank and was looking for a good filter. This works very well...." Read more

"Easy to clean, Effective, and High quality. Added an air stone inside and it's perfect. I bought two more for my other tanks." Read more

"It works great..." Read more

4 customers mention4 positive0 negative

Customers find the installation process of the pet filter to be easy. They mention that it's cost effective and can't go wrong with the filter.

"...Also made to easily install air stone." Read more

"...will continue to buy these filters as they are cost effective and easy to maintain...." Read more

"Great value fast ship,easy maintence can't go wrong with this filter" Read more

"Easy to install..." Read more

3 customers mention3 positive0 negative

Customers like the bacteria in the filter. They say it provides faster flow and more surface area for bacteria. They also say it allows for more flow and better beneficial bacteria.

"...The reticulated ( coarse) sponge allows for more flow and better beneficial bacteria and greater time between cleaning...." Read more

"...This allows more surface area for the plants. These are excellent filters...." Read more

"...a new reticulated sponge which provides faster flow and more surface area for bacteria...." Read more

3 customers mention3 positive0 negative

Customers find the pet supplies easy to clean. They mention it's effective, has beneficial bacteria, and can go longer between cleanings.

"...allows for more flow and better beneficial bacteria and greater time between cleaning. Also made to easily install air stone." Read more

"Easy to clean, Effective, and High quality. Added an air stone inside and it's perfect. I bought two more for my other tanks." Read more

"I like that it’s east ro clean" Read more

3 customers mention3 positive0 negative

Customers like the flow of the pet supplies. They say the reticulated sponge provides faster flow and more surface area. They also say the sponge is exactly what they wanted and doesn't clog as fast or grow algae.

"Great filter. Superb quality. The reticulated ( coarse) sponge allows for more flow and better beneficial bacteria and greater time between cleaning...." Read more

"...The PRO version has a new reticulated sponge which provides faster flow and more surface area for bacteria...." Read more

"It was the IV Pro version, spongeExactly what I wanted. Doesn't clog as fast, or grow algae." Read more

Arrived with cracked on base
1 Star
Arrived with cracked on base
A few day after I received and installed filter I did a small water change. While inspecting the filter I noticed a hairline crack on the base and rust beginning to develop. I contacted Amazon and returned the filter for credit.The filter looked well made and designed. I also liked that it was made in the USA.
Hide
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

Piercepack
5.0 out of 5 stars It makes a great prefilter for a canister filter.
Reviewed in the United States on March 20, 2023
Size: V - Up to 125 gallonsVerified Purchase
I have been fighting trying to find a good prefilter for my canister filter for a while now, it’s custom built, and I have 1 inch hoses. I had a few designs that worked for a while, but each had their own flaws. Most of them would clog after only a day or two. This filter allows me to go between weekly cleanings without clogging or worrying about being too open and sucking up my smaller guys, it has the flow I needed for my pump, and it seems well made. Definitely different from other sponge filters I’ve bought, and I’ve bought and modified several designs. These have a really nice pore size/ratio, are relatively stiff, and in my opinion are generally great prefilters.
Helpful
 Report
Lauri Downs
5.0 out of 5 stars Works great!
Reviewed in the United States on December 10, 2023
Size: III - Up to 40 GallonsVerified Purchase
I am breeding Peacock Gudgeons and I use this filter for my 10 gallon empty breeding tanks. It works perfectly for raising fry because it doesn’t produce a strong current in the fry tank.
Helpful
 Report
marshall
5.0 out of 5 stars Great sponge filter.
Reviewed in the United States on June 17, 2023
Size: II - Up to 20 gallonsVerified Purchase
Great filter. Superb quality. The reticulated ( coarse) sponge allows for more flow and better beneficial bacteria and greater time between cleaning. Also made to easily install air stone.
One person found this helpful
Helpful
 Report
Eric B.
5.0 out of 5 stars Great sponge filters
Reviewed in the United States on January 17, 2023
Size: IV - Up to 80 GallonsVerified Purchase
I use several sizes of these filters with powerheads in a 29-gal planted tank and a 120-gal planted community tank. They are stackable which is nice. The larger sizes are really large; I found I prefer to have stacks of 2 of the smaller sizes in the larger aquarium. This allows more surface area for the plants. These are excellent filters. I use them with power heads and these don't get clogged and collapse when they start getting dirty (when I neglect the weekly maintenance). Some other brands with fine foam will collapse when they clog a bit and are attached to a power head. I will continue to buy these filters as they are cost effective and easy to maintain. Only downside with sponge filters in general is that some of the detritus falls back into the tank when you pull the filters out for cleaning. But when you squeeze them into a bucket of dechlorinated water you see how much stuff they removed so most of it gets stuck in the filters. Highly recommended.
One person found this helpful
Helpful
 Report
Henry
5.0 out of 5 stars The balls
Reviewed in the United States on November 20, 2023
Size: IV - Up to 80 GallonsVerified Purchase
Perfect sponge filter,you jeed a pretty powerful pump to really work it.its huge.
Helpful
 Report
Hawkeye
1.0 out of 5 stars Arrived with cracked on base
Reviewed in the United States on February 7, 2024
Size: III - Up to 40 GallonsVerified Purchase
A few day after I received and installed filter I did a small water change. While inspecting the filter I noticed a hairline crack on the base and rust beginning to develop. I contacted Amazon and returned the filter for credit.
The filter looked well made and designed. I also liked that it was made in the USA.
Customer image
Hawkeye
1.0 out of 5 stars Arrived with cracked on base
Reviewed in the United States on February 7, 2024
A few day after I received and installed filter I did a small water change. While inspecting the filter I noticed a hairline crack on the base and rust beginning to develop. I contacted Amazon and returned the filter for credit.
The filter looked well made and designed. I also liked that it was made in the USA.
Images in this review
Customer image
Customer image
Helpful
 Report
JoeJ
5.0 out of 5 stars The Original Sponge Filter is Still the Best
Reviewed in the United States on June 5, 2022
Size: II - Up to 20 gallonsVerified Purchase
This is the original design and manufacturer (ATI) of the sponge filter. There are many copycats out there but this one is the best. The PRO version has a new reticulated sponge which provides faster flow and more surface area for bacteria.

My suggestion is to always go up one size to make sure you have adequate filtering. For example, if you have a 20 gallon tank don't buy the 20 gallon max model but go up to the next size.
7 people found this helpful
Helpful
 Report
Mama Bear
5.0 out of 5 stars Great filter, the ORIGINAL one, not a knock-off
Reviewed in the United States on November 4, 2020
Size: II - Up to 20 gallonsVerified Purchase
I have a 6 gallon Betta tank and was looking for a good filter. This works very well. I had to cut down the plastic tube at top (easy to cut, I did it with a kitchen knife!) so that it fit underwater in my 6 gallon tank. I also bought an airstone to put inside to decrease the intensity of the flow. I attached the airstone with a little one inch piece of tubing. This is the ORIGINAL sponge filter, not one of the many Chinese knock offs that you'll find on Amazon and elsewhere.
2 people found this helpful
Helpful
 Report